How does a CT scan differ from MRI?

How does a CT scan differ from MRI?

Kenneth W. Chin (M.D., F.A.C.R.) gives expert video advice on: What is a CT scan used for?; Does the radiation involved with CT scans pose a health risk?; Is a CT scan done differently on children? and more...

A CT scan differs from an MRI in that CT scanning uses ionizing, or x-ray radiation. MRI scanning on the other hand doesn't use any ionizing radiation but requires that a patient be placed in a high strength magnetic field.